表面活性剂溶液清洗油污土壤试验研究  

Cleaning of Diesel-Polluted Soil with Surfactants

作　　者：支银芳[1] 陈家军[1] 杨官光[1] 尉斌[1] 

机构地区：[1]环境模拟与污染控制国家重点联合实验室/北京师范大学环境学院,北京100875

出　　处：《土壤》2007年第2期252-256,共5页Soils

基　　金：国家自然科学基金项目(40272107);教育部重点基金项目(104012)共同资助。

摘　　要：选用两种阴离子型表面活性剂十二烷基苯磺酸钠(LAS)和十二烷基硫酸钠(SDS)及两种非离子型表面活性剂Triton X-100和Tween 80,研究了临界胶束浓度(CMC)附近各表面活性剂溶液对柴油的增溶及一次性清洗油污土壤的能力。结果表明:在CMC附近,各表面活性剂对柴油的增溶能力大小顺序为SDS<LAS<Triton X-100<Tween 80;对油污土壤的一次性清洗中柴油去除率的大小顺序为LAS>SDS>Triton X-100>Tween 80,两种阴离子型表面活性剂的清洗效果优于两种非离子型表面活性剂。Two anionic surfactants, dodecylbenzene sulfonic acid sodium salt （LAS） and sodium dodecyl sulfate （SDS）, and two nonionic surfactants, Triton X-100 and Tween 80, were selected in the research on their capability of enhancing water solubility of diesel and cleaning diesel-polluted soil once for all when they were around their critical micelle concentration （CMC）. Results showed that in terms of capability of enhancing water solubility of diesel, the four surfactants were in the sequence of SDS〈LAS〈Triton X-100〈Tween 80, whereas in terms of efficiency in cleaning diesel-polluted soil LAS〉SDS〉Triton X-100〉Tween 80, and anionic surfactants showed higher cleaning efficiency than nonionic suffactants.

关 键 词：土壤污染 柴油 表面活性剂 清洗 

分 类 号：X131.3[环境科学与工程—环境科学]